Electrical and dielectric properties of polymer composite based on vanadium dioxide
| Autor: | V. R. Kolbunov, A. S. Tonkoshkur, I. V. Gomilko |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Polypropylene Phase transition Materials science Thermistor 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Electrical resistance and conductance Electrical resistivity and conductivity 0103 physical sciences Charge carrier Electrical and Electronic Engineering Composite material 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 28:8322-8328 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-017-6547-9 |
| Popis: | Samples of a polymer composite based on polypropylene and vanadium dioxide VO2 with the volume concentration from 0 to 1 were investigated. It was shown that the electrical conductivity of composites has the percolation-like character, and the current–voltage characteristics are S-shaped. In the temperature dependence of the electrical resistance of the composites samples, a sharp resistance decrease was detected at the temperature of the semiconductor–metal phase transition in VO2, sufficient for use in critical thermistor elements. It was established that the variance of the dielectric permittivity in the range of frequencies 105−107 Hz can be interpreted as part of the Maxwell’s mechanism of migration polarization associated with the separation of free charge carriers in vanadium dioxide particles in the semiconducting state. It was shown that the dependence of the low-frequency dielectric permittivity on the volume concentration of the filler can be interpreted in terms of a statistical mixture model. |
| Databáze: | OpenAIRE |
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